radio AUDI A4 1995 B5 / 1.G AC System On Board Diagnostic Workshop Manual

01-14

Part
number Comments
8D0 820
043 D - G
Regulation is only switched off in
On Board Diagnostic (OBD)
during output diagnostic test
mode and basic setting.
For vehicles with 6 cylinder
engines, must only be combined
with Zexel compressor.
8D0 820
043 after
H For all vehicles up to m.y. 96.
8L0 820
043 A - C For all vehicles up to m.y. 97 (lighting
via terminal 58 and 58d)
8L0 820
043 after
D For all vehicles up to m.y. 98 without
radio navigation system up to VIN
199999 of m.y. 1999 (lighting
indirectly activated via terminal 58s).
8D0 820
043 K or L Version with only one display (for
vehicles with radio navigation system
up to VIN 199999 of m.y. 1999)
8D0 820
043 after
M Version with only one display (for
vehicles as of VIN 200000 of m.y.
1999)
Pa
ge 17 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

01-15

Notes:

Zexel A/C compressors were installed from
start of production. During m.y. 1996,
Nippondenso type compressors are installed as
a running change. These compressors are not
equipped with A/C speed sensor G111.
The A/C control head is coded to reflect the
compressor type installed (Zexel or
Nippondenso).
Vehicles equipped with Nippondenso (Denso)
compressors must have A/C control head with
Part No. index "H" or higher installed to allow
for correct coding.
Follow coding exactly when replacing an A/C
control head -E87-.

Parts catalog microfiche

A/C control head varies after VIN 200000 of
m.y. 1999 for vehicles with and without radio
navigation system (or a radio with a large
control panel), with and without switch for
heated seats (e.g. index "M", "N", "P" or "Q").
Pa
ge 18 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

01-27

VAG1551 scan tool
display Possible cause
Corrective action
00604
Back Pressure Flap
Motor Position Sensor
G113 in Air Flow Flap
Motor V71

Short circuit to
ground /SP

Open circuit/short
circuit to positive /SP

Adaptation limit
exceeded1)

Inoperative - Short circuit, open circuit in wiring or incorrect terminal
assignment (wires interchanged) of connectors between -
G113- and -E87-
- Air flow flap not operating freely
- -G113- in -V71- inoperative- Diagnose and repair short circuit,
open circuit in wiring or confirm
terminal assignment using wiring
diagram

- Check for free operation of air flow
flap2)
- Replace -V71-
00625
Road speed signal

Implausible signal /SP - Loose terminal in wiring/connections between
Speedometer Vehicle Speed Sensor (VSS) G22, the
instrument cluster or in another component also
connected to this signal (e.g. radio or control module for
cruise control) and -E87-
- Speedometer -G21- or instrument cluster supplying
unusable signal or a component disrupts signal - Diagnose and repair loose terminal
using wiring diagram.





Pa
ge 35 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

01-61

Part
number Comments
8L0 820
043 after
D For all vehicles up to m.y. 98 without
radio navigation system up to VIN
199999 of m.y. 1999 (lighting
indirectly activated via terminal 58s).
8D0 820
043 K or L Version with only one display (for
vehicles with radio navigation
system up to VIN 199999 of m.y.
1999)
8D0 820
043 after
M Version with only one display (for
vehicles as of VIN 200000 of m.y.
1999)

A/C control head -E87- (with one display),
coding table vehicles 1998
Notes:

A/C control head coding 1996 page 01
-
57
.

The following coding table is only valid for A/C
control heads with part number 8D0 820 043
after index "K." Additional coding tables and
coding A/C control head -E87- page 01
-57
.
A/C control heads -E87- with the part number
8D0 820 043 after index "K" have only one
Pa
ge 88 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1

display, they are installed in the following
vehicles:

in vehicles with radio navigation system
(implemented gradually in m.y. 1998)
in vehicles with radio navigation system after
VIN 200000 of m.y. 1999
Pa
ge 89 of 91 A/C s
ystem, On Board Dia
gnostic
(OBD
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.01.1